Garrett Popcorn is celebrating its 68th birthday this month, and the Chicago company will once again share the celebration with the city.

From 11 a.m. to 1 p.m. each Wednesday throughout September—that means tomorrow, Sept. 20 and Sept. 27—certain Garrett locations in Chicago will be selling 68-cent treat-size bags of their Garrett Mix, the famous blend of CaramelCrisp and CheeseCorn. You’ll also get a scratch-off card that can yield prizes or upgrades on your next visit.

So set your alarm for an upcoming Wednesday to grab a spot in line, and head to one of these locations for a cheap, sweet treat: